Re: Compiling with gcc 15

Étienne Mollier <[email protected]> Mon, 11 Aug 2025 22:24:19 +0200
Newsgroups	gmane.linux.debian.devel.medical
Message-ID	<[email protected]>
Hi Sébastien,

Sébastien Jodogne, on 2025-08-11:
>          I am unable to reproduce this error on Debian unstable by
> manualling compiling the package from source using the following
> invocation of CMake (same invocation as in the "debian/rules" file):
> 
> $ CC=gcc-15 CXX=g++-15 cmake ../MySQL/ [...]
> 
> Please could someone explain me how to reproduce this issue?
> 
> I guess this results from different versions of the dependencies
> installed on my system, so I should provide the gcc/g++ version to
> "pbuilder" or "gbp buildpackage", but I cannot find how to do this.

For what it's worth, I have attempted to reproduce the issue in
different configurations of sbuild (driven by gbp buildpackage),
involving Gcc 15 in sid or experimental with the below detection
by cmake

	[…]
	-- The C compiler identification is GNU 15.2.0
	-- The CXX compiler identification is GNU 15.2.0
	-- Detecting C compiler ABI info
	-- Detecting C compiler ABI info - done
	-- Check for working C compiler: /usr/bin/gcc-15 - skipped
	-- Detecting C compile features
	-- Detecting C compile features - done
	-- Detecting CXX compiler ABI info
	-- Detecting CXX compiler ABI info - done
	-- Check for working CXX compiler: /usr/bin/g++-15 - skipped
	-- Detecting CXX compile features
	-- Detecting CXX compile features - done
	[…]

But I failed to reproduce any error at all.  My changes to the
Salsa source tree look like

	$ git diff
	diff --git a/debian/control b/debian/control
	index 1756079..21510bd 100644
	--- a/debian/control
	+++ b/debian/control
	@@ -4,6 +4,8 @@ Uploaders: Sebastien Jodogne <[email protected]>
	 Section: science
	 Priority: optional
	 Build-Depends: cmake,
	+               gcc-15,
	+               g++-15,
	                debhelper (>= 10),
	                libcurl4-openssl-dev | libcurl4-dev,
	                libgtest-dev,
	diff --git a/debian/rules b/debian/rules
	index 027b9a2..540ba64 100755
	--- a/debian/rules
	+++ b/debian/rules
	@@ -13,6 +13,9 @@ export DEB_BUILD_MAINT_OPTIONS := hardening=+all
	 export DEB_CFLAGS_MAINT_APPEND=-DNDEBUG
	 export DEB_CXXFLAGS_MAINT_APPEND=-DNDEBUG
	 
	+export CC = gcc-15
	+export CXX = g++-15
	+
	 %:
	        dh $@ --builddirectory=Build
	 

I have also tested a variant involving gcc 15 as default version
of gcc in experimental without much change in the behavior of
the build.  I have uploaded my full build log of the sid build
variant on the people's web server[1] to facilitate pinpointing
the relevant change.  My current conjecture is, that a change in
Boost could have removed a <cassert> import.  There is a wave of
bugs open about the upcoming Boost 1.88 and it's possible that
the entry missed that crucial information.

[1]: https://people.debian.org/~emollier/logs/orthanc-mysql/orthanc-mysql_5.0+dfsg-1_amd64-gcc-15.build.xz

In hope this helps,
-- 
  .''`.  Étienne Mollier <[email protected]>
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